Sealed bag having a pair of handles attached to two folded end portions and retained thereafter the contents are dispensed

ABSTRACT

By first folding inwardly one closed end of a tube made of a synthetic resin to form opposing folded end portions, thereafter thermally bonding or adhesively attaching a thick piece of plate made of a synthetic resin to each of said end portions either on the inside or outside of the fold or between the two sheets of the tube constituting the fold, then forming a grip hole in each of the attached two pieces of plate (said grip hole may be formed in advance), thereafter packing desired contents in said tube from the open end on the other side of the tube, and then sealing this open end, there is provided a bag having a pair of grip handles which are retained on the bag after the portion of the tube material located between the folded two end portions is cut apart to dispense the contents.

United States Patent [72] Inventors Rinnosuke Susuki Tokyo; HiroshiHoshi, Chiba-ken; Shinichi Araki; Takashi Ohshita, Tokyo; ShinzoMiyamoto,

[54] SEALED BAG HAVING A PAIR OF HANDLES ATTACHED TO TWO FOLDED ENDPORTIONS AND RETAINED THEREAFTER THE CONTENTS ARE DISPENSED 4 Claims, 7Drawing Figs. [52] US. Cl. 229/54, 1 50/12 [51] Int. Cl 865d 33/06 [50]Field of Search 229/54; 150/ l 2 Primary Examiner-David M. BockenekAttorney-Cushman, Darby and Cushman ABSTRACT: By first folding inwardlyone closed end of a tube made of a synthetic resin to form opposingfolded end portions, thereafter thermally bonding or adhesivelyattaching a thick piece of plate made of a synthetic resin to each ofsaid end portions either on the inside or outside of the fold or betweenthe two sheets of the tube constituting the fold, then forming a griphole in each of the attached two pieces of plate (said grip hole may beformed in advance), thereafter packing desired contents in said tubefrom the open end on the other side of the tube, and then sealing thisopen end, there is provided a bag having a pair of grip handles whichare retained on the bag after the portion of the tube material locatedbetween the folded two end portions is cut apart to dispense thecontents.

PATENTEDMAR 2:97:

SHEET 1 [IF 2 FIG.2

FIG.

PATENTEUVHAR 2197i SHEET 2 [IF 2 FIG.7

SEALED BAG HAVING A PAIR OF HANDLES ATTACHED TO TWO FOLDED END PORTIONSAND RETAINED THEREAFTER TI'IE CONTENTS ARE DISPENSED BACKGROUND OF THEINVENTION l. Field of the Invention The present invention is concernedwith a bag, and more particularly, it relates to a bag having a pair ofgrip handles securely attached to two folded end portions extendingoutwardly from one closed end of the bag which is intended forcontaining detergent, foods, drugs or the like in the form of powder.

1. Description of the Prior Art I There are a variety of bags made ofsynthetic resin and having a pair of grip handles attached to one end ofthe bags. However, these bags of the prior art invariably are providedwith a sealed portion extending transversely of the bag close to one endof the bag, said sealed portion being formed after the bag has beenpacked with contents. The grip handles are attached to the portions ofthe tube material on the side closer to the end of the bag from theaforesaid seal line. For this reason, when the bag is cut open along theseal line, the grip handles are alsoseveredfrom the body of the bag, andas a result, the grip handles no longer serve as handles.

SUMMARY OF THE'INVENTION It is, therefore, the primary object of thepresent invention to improve or eliminate the aforesaid disadvantage andshortcoming of the grip handles of bags of the prior art and to providea novel bag having a pair of grip handles which are retained in placeeven after the bag material located between the grip handles is cut opento dispense the contents and which permit the user to continuouslyutilize the bag for shopping or like purposes.

Another object of the present invention is to provide a bag of the typedescribed made of a-synthetic resin, which is used as a package that iscapable of perfectly insulating the contents from external moisture.

Still another object of the present invention is to provide a bag of thetype described which can be easily manufactured on a mass productionbasis in continuous manufacturing process. These and other objectstogether with the attendant advantages will become apparent by readingthe following detailed description in conjunction with the accompanyingdrawings.

It should be understood that like parts in each of the embodiments areindicated by like reference numerals for the simplicity of explanation.

FIG. 1 is a somewhat simplified perspective view, showing an embodimentof the present invention;

FIG. 2 is a vertical sectional view of the grip handle portion oftheembodiment in FIG. 1;

FIG. 3 is a somewhat simplified perspective view, showing anotherembodiment of the present invention;

FIG. 4 is a fragmentary vertical sectional view, in an enlarged scale,taken along the line 4-4 in FIG. 3;

FIG. 5 is a view similar to that in FIG. 4, showing still anotherembodiment of the invention; and

FIGS. 6 and 7 are a perspective view and a simplified plan view,respectively, for the explanation of the manufacturing process toclarify the structure of a still another embodiment of the bag of thepresent invention.

As will be noted in FIGS. 1 and 2, reference numeral 1 represents a bagwhich is formed with a tube of a synthetic resin such as polyethyleneand polypropylene by thermally bonding each of the open ends as at 11and then folding each of the opposing end portions of the tube materialfor an appropriate distance to thereby form opposing two folded endportions 12. Apart from this bag, two pieces of plates made of asynthetic resin each having an appropriate thickness greater than thatof the bag body 1 and an appropriate shape and an appropriate grip hole21 are prepared to provide grip handle members 2. Each of thesehandlemembers is attached as at 22, by relying on the then'nal bondingtechnique, to the outer surface of each of the aforesaid folded endportions of the bag body 1. In addition to this, these grip handles 2are subjected to auxiliary welding at appropriate sites (in theembodiment illustrated, this auxiliary welding is provided at two sitesas at 23 below the grip hole 21 for the convenience of explanation) byrelying on the spot welding technique or like means, whereby completingthe bag of the present invention. It is only necessary to fill this bagwith desired contents by introducing them therein from the bottom openend of the bag and then to seal this open end by relying on the thermalbonding technique.

FIGS. 3 and 4 show another embodiment of the present invention. In thesedrawings, reference numeral 1 represents a bag body '1 made with a tubeof a synthetic resin such as polyethylene and polypropylene. One of theopen ends of the tube is closed by thermal bonding asat 11 and then thisend portion is folded inwardly along the opposing end edges of thesheets of the tube to form opposing two folded portions 12. Then, bycutting the bilateral edge portions of the folded portions in anappropriate fashion, there are produced grip handle sections 13 as willbe understood from FIGS. 3 and 4. A piece of plate 3 made of a syntheticresin and having an appropriate thickness greater than that of the bagbody 1 is inserted between the two sheets of tube material whichconstitute one of the folded portions 2 and another piece of plate isinserted in the same way in the other of the two folded portions.Thereafter, the peripheral edges of each of the grip handle sections aresubjected to thermal bonding as at 16, and then a grip hole 17 is formedthrough each of these two handle sections. Subsequently, thermal bonding18 is provided between the respective sheets and plates 3 around saidgrip holes 17 to seal the bag. After this, desired contents areintroduced into the tube from the open end of the bag, and then thisopen end is closed by thermal bonding as at 19.

FIG. 5 is still another embodiment of the invention, wherein the pieceof plate is thermally bonded to the inside of the respective foldedportions 12. This embodiment provides the same functional effect andadvantage as those obtained from the preceding embodiments FIGS. 6 and 7are somewhat simplified representations for explaining the structure ofstill another embodiment of the invention. In this embodiment, a film101 which is made of a synthetic resinous material or laminatedsynthetic resinous sheets (hereinafter to be referred to simply aslaminated sheet) is folded longitudinally along one side edge so as toform opposing two folded portions in U-shaped as shown in FIG. 6. A tape102 having a thickness greater than the film but having the same qualityas that of the film material and also having a breadth slightly smallerthan the width b of the fold is inserted in each of the fold. Each ofthis inserted tapes is then thermally bonded as at to the tube materialof each folded section for a distance corresponding to the desiredbreadth indicated at a of the bag. Then the resulting tube is cut at theline a from the remaining portion of the tube. The portion b of the tubematerial containing the tape will provide the aforesaid U-shaped whenthe tube is cut in the aforesaid manner. Thus, a bag configuration asshown in FIG. 7 is formed. Thereafter, the edges of the handle section103 located in the upper portion of the bag body are thermally bondedtogether in the manner as shown in FIG. 7 to provide the grip handles.The resulting bag body is then subjected to the same subsequentfabricating procedure as that discussed in the preceding embodiment ofFIG. 5. Thereafter, desired contents are packed into this bag from theopen end thereof, and then this open end is closed by thermal sealingtechnique as at 19.

It should be understood by those skilled in the art that the thermalbonding which is used in each of the foregoing embodiments may bereplaced by bonding effected by the use of an adhesive.

The bag of the present invention which is provided with a pair of handlesections has been described. In each of the embodiments, the bag may becut open at a site between the opposing two folds 12 or 102. By doingso, it is possible to dispense or withdraw the contents from the bagwithout damaging the handle sections and severing them from the bagbody. By cutting said site of the bag, the incised portion of the bag isnot viewed or easily recognized externally of the bag and thus a goodappearance of the bag is retained. Therefore, after the contents havebeen completely withdrawn from the bag, the resulting empty bag may beutilized for putting things in during shopping or for similar purposes.It is to be noted also that this bag is of a simplified structure whichis suitable for mass production, and accordingly, the bag of the presentinvention can be provided at a low cost. Besides, the material of thebag coupled with sealing will permit the contents to be perfectlyshielded from external moisture, and as a result, this bag will providea perfect moistureproof package.

We claim:

1. A bag made of a tube of synthetic resin, and comprising one closedend, said one end being folded of the opposing sheets of the tube toform opposing two folded end portions which are provided with a thermalbonding of broad width along the whole portion of foremost ends thereof;a pair of grip handle members made of synthetic resin thicker than thatof the bag, each having a hole for insertion of fingers and being of awidth almost equal to that of the bag, said grip handle members beingsecurely attached by thermal bonding of broad width to almost the wholewidth of said opposing two folded end portions; and an open end fromwhich desired contents are packed into the bag and which is closed bythermal bonding of broad width.

2. A bag according to claim 1, in which said grip handle members aresecurely attached along the whole root portion almost equal to thediameter of the bag opening to the opposing two folded end portions,respectively, on the outer sides thereof, and said handle members aresubjected to auxiliary welding at appropriate sites by relying on thespot welding technique.

3. A bag according to claim 1, in which said grip handle members aresecurely attached along the whole one sides thereof except the gripholes to the opposing twofolded end portions, respectively, on the innersides thereof, and thermal bonding is provided between said folded endportions and said handle members around said grip holes.

4. A bag according to claim 1, in which said grip handle members aresecurely attached to the opposing two folded end portions, respectively,the whole portion of each of said handle members being sandwichedbetween the opposing two sheets of the tube constituting one fold; theperipheral edges of each of the grip handle sections being produced bycutting the bilateral edge portions of said folded end portions whichare subjected to thermal bonding; and thermal bonding is providedbetween the respective sheets of said folded end portions and saidhandle members around grip holes formed through each of said handlesections.

1. A bag made of a tube of synthetic resin, and comprising one closed end, said one end being folded of the opposing sheets of the tube to form opposing two folded end portions which are provided with a thermal bonding of broad width along the whole portion of foremost ends thereof; a pair of grip handle members made of synthetic resin thicker than that of the bag, each having a hole for insertion of fingers and being of a width almost equal to that of the bag, said grip handle members being securely attached by thermal bonding of broad width to almost the whole width of said opposing two folded end portions; and an open end from which desired contents are packed into the bag and which is closed by thermal bonding of broad width.
 2. A bag according to claim 1, in which said grip handle members are securely attached along the whole root portion almost equal to the diameter of the bag opening to the opposing two folded end portions, respectively, on the outer sides thereof, and said handle members are subjected to auxiliary welding at appropriate sites by relying on the spot welding technique.
 3. A bag according to claim 1, in which said grip handle members are securely attached along the whole one sides thereof except the grip holes to the opposing two folded end portions, respectively, on the inner sides thereof, and thermal bonding is provided between said folded end portions and said handle members around said grip holes.
 4. A baG according to claim 1, in which said grip handle members are securely attached to the opposing two folded end portions, respectively, the whole portion of each of said handle members being sandwiched between the opposing two sheets of the tube constituting one fold; the peripheral edges of each of the grip handle sections being produced by cutting the bilateral edge portions of said folded end portions which are subjected to thermal bonding; and thermal bonding is provided between the respective sheets of said folded end portions and said handle members around grip holes formed through each of said handle sections. 